1. Mth060 Day 3 Sections 1.4 & 1.8

2. Multiplication & Division with Real Numbers Section 1.4

3. Operations with Signed Numbers Rules for Add/Subtract different than Mult/Div Addition – Find the SUM Subtraction – Find the DIFFERENCE Multiplication – Find the PRODUCT Division – Find the QUOTIENT Handout – REFERENCE SHEET

4. Ways to Write Multiplication Same Thang! NOT the Same Thang!

5. Multiplication by Zero Everything MULTIPLIED by zero is (=) zero

6. Ways to Write Division Same Thang! Something to MEMORIZE! Check this out on your calculator

7. Same Thang! Where do I put the negative sign? NOT THE SAME THANG!

8. Example #1 – Find the Product

9. True/False

10. Average aka Mean Average Defined: the average of a SET of numbers is the sum of the set of numbers divided by the number of numbers in the set.

11. Example #2 Fifteen students scored the following scores on an exam in Algebra I: 1 scored 67, 4 scored 73, 3 scored 77, 2 scored 80, 3 scored 88, and 2 scored 93. What was the average score for these students?

12. Try it… Find the mean of the following set of integers: -10, 15, 16, -17, -34, and -42

13. Order of Operation Section 1.8

14. Rules for Order of Operations 1.Simplify within grouping symbols parentheses ( ), brackets [ ], and braces { }, working from the innermost grouping outward. 2.Evaluate exponents. 3.Moving LEFT to RIGHT, perform multiplication OR division. 4.Moving LEFT to RIGHT, perform addition OR subtraction.

15. PEMDAS Mnemonic to remember order: Parentheses Exponents Multiplication OR Division (caution: left to right) Addition OR Subtraction (caution: left to right)

16. More examples of “grouping symbols” Fractions: Absolute Values: Roots:

17. Example #1 Use the Order of Operations to evaluate the expression:

18. Try it… Use the Order of Operation to evaluate the expression:

19. Summary Syllabus Reference sheet Multiplication/Division Rules versus Addition/Subtraction Rules Combine it all together with Order of Operation: PEMDAS

20. Coming up… Due Dates Quiz #2 Due Friday (RECALL: includes problems from Day 1 forward) – Taken in SMART Lab – Lab Closes at 4 PM on Fridays Reading Guides for Day #4 – Sections 2.1a-b – On Blackboard

21. Exit Ticket 1.Find the SUM: 2.Find the DIFFERENCE: 3.Find the PRODUCT: 4.Find the QUOTIENT: